Tooth-brush.



UNITED- sTATEs PATENT oEEIoE.

EEBDINANDC. KUINDEZBJS, OF-SETTLE, WASHINGTON.

TOOTH-BRUSH.

'Speo'ication nf Letters Patent.

Patented Oct. 8, 1912.

Application filed 'February 20, 1912. Serial No. 678,789.

` againstithe teetha so as to effect 'a rapidand 'the casing effective cleaning of the teeth.

Another object of the invention is to pro-` vide a brush which willinclude a. plurality of sections which may be readily separated when desired whereby the parts may be thoroughly vcleaned and maintained' in a sanitary condition.` l

In the drawing forming a portion of thisapplication and 1n 'which like letters of reference indicate similar' `parts in the several. views:AA Figure 1 is a f longitudinal section through the brush. Fig. is a section on linel 2 2 of Fig. 1.A Fig. 3 is a side View of the casing.' Fig. I4 is' a. section'on line 42-4 of Fig. l.' --liig 5 is a section through a part of and'through the handle showing al slightly modified form of the invention.-

The toothbrush comprises a core 1 from 'which the radial bunches of bristles 2. ex-

tend. The core issecured to the lshaft 3 adjacent to'one end thereof. This shaft ex-` tends through 4a4 hollow" casing Li and within the casing the shaft is provided with a substantially screw or 4worm portion' 5,

A guard 6 which is substantially of semi'- cylindrical configuration `in cro'ss sectionI partly embraces the bristles of the brush andA at one end the 'guar-dis provided with a head'-7' in which a ,bearing passage 8 is formed. The opposite end' of'the guard G is provided with anv enteriorly threaded ex tension9. At one end,'th`e shaft 3 has' ,a bearing portion 10 ,which is journaled` in the pesage 8. The shaft 3 extends through the extension 9 on the guard and through' the casing 4 hereinbefore described and beyond the outer-end of 'thex casing the shaft' is pointed as at 11 and Journaled in a corre spondingly formed socket 12 in the handle ,13. They flared walls of the socket -12 are extended into'. the threadedjvalls la, which latter receives vthe threaded end l5 of the casing 1. This construction' is suchthat the handle 13 can be adjusted longitudinali on the casing 4 whereby longitudinal a j ustment of the shaftyJ can be'made to insure therethrough, the positive seating of the portion 10 'of the shaft 'in itsbearing passagel 8, in the guard. t l

The casing 4 is slotted on its opposite sides as `at 16, the said -slots opening onto the end of the casing at a 'point adacentJ to the handle 13. A sleeve 17 isfslidable longitudinally on the casing. This. sleeve isvcon neced therewith by means of diametrically opposed lugs l9,`and a shaft actuated nut 18. The said nut 18 of the'sleeve is pro, vided with a rectangular passage 2O therein which receives the screw or Worm like portion 5 of tl 1e shaft 3. .Now itis evident, from the construction 4described. ,that the sleeve 17 may he manually reciprocated `upon the casing 4 wherebyto' impart rotar movements in two'directions to the sha t `3. The bristles 2 may be brought into eng'agement4 with the teeth .whereby to permit of their being rapidlyand thoroughly cleaned. All of the parts ofthe brush are detachable so as to permit them to be disconnected from each other where they may be subjected -to va cleaning medium and maintained in a perfect sanitarytcondition.

to protect the cheek of he guard G serves against injury as the the uservof the .brush brush is rotated.

. .In'the modified .form of the invention shown in. Fig' the handle 13 is soldered or otherwise suitably secured as at 21 to one end ofthe casing 4 I claim A rotary tooth brush comprising a longitudinally slotted casing having one of .its ends exteriorly threaded, a guard carried by the..opposite end'of said casing, .a shaft extending through thecasing,

the guard and having one end journaled in one of the walls of the'guard, bristles extending radially from the shaft, 'a sleeve s lidably mounted on `thei-casingand slid-l ably embracing the eitteri'orofA said casing, said sleeve having connected therewlth by.

means of diametrically opposed lugsa shaft actuated nut, lSaid nut extending transversely throughout the interior of said sleeve, said lugs being integrally formed and through 'with the inner face of said elee-Ie at e point v and hayin-g a heering pssege reeeiving one I intermediate the ends thereof and adapted end of the shaft. .1u to extend through thev slots of the casing, In testimony whereof I affix my signature said nut being operatively associated' with in presence of two Witnesses.' f theeha-ft so es, to revolve the same on thel y FERDINAND C. KUI'N'DERSH sliding movement of the sleeve upon the Witnesses:

easing, and a handle detaehably mounted on H. A. MARTIN, the exteniorly threaded end of the casing LEROY L., ToDD.

@piles of this patent may be obtained for ve `cents each, by addressing the Commissioner of Patents, i Washington, D. Cfr" 

